!!!Did you know this about Australia? Did you know that Australia is among the top 10 of the 193 UN countries in the following 10 respects. #Mothers mean age at first birth - years: 30.5 (Rank 2). #Total Area - sq km: 7,741,220 (Rank 6). #Land Area - sq km: 7,682,300 (Rank 6). #Coastline - km: 25,760 (Rank 6). #Airports - with paved runways: 349.0 (Rank 6). #Railways - km: 38,445 (Rank 7). #Life expectancy at birth - years: 82.07 (Rank 7). #Internet hosts: 17,081,000 (Rank 8). #Roadways - km: 823,217 (Rank 9). #Electricity - production per capita - KWh: 10,019 (Rank 10).